None that caused me to delete the file. It's pretty easy to get past any chapter by just abusing the map/supports/enemyAI, but some minor ones...
Dumped all my B.EXP onto Fiona in Part 1. (I liked her armor color. =( ) Used Tormod a lot, didn't realize that the little b****** would disappear for 80% of the game. Didn't use any Flying units. (Thanks Desert Map) Used way too many sword users. (All of the Swordmasters, made fighting all of those generals in the final 5 chapters OH SO fun.) Didn't use any supports, got mad when they were just generic messages that could be exchanged with anyone else.